10/20/2026
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Reverse Osmosis: The Technical Facts & MechanicsReverse Osmosis (RO) pushes pressurized tap or well water through a semipermeable membrane (rated down to 0.0001 microns). While standard sediment and carbon blocks catch grit, chlorine, and odors, the RO membrane removes up to 98% of total dissolved solids (TDS). What It Strips Out:Heavy metals (lead, arsenic, copper) Agricultural chemicals (nitrates, pesticides, herbicides) Dissolved salts, fluoride, and minerals Microorganisms and cyst-forming parasites The Catch on Central Indiana Well Systems:RO units need stable water pressure—ideally 50 to 60+ PSI. Typical Indiana well tanks cycle between 30/50 or 40/60 PSI. When that pressure drops, RO production crawls to a trickle. Hard limestone water and dissolved iron will chew through an RO membrane fast if there isn't a solid water softener or iron filtration unit upstream to protect it. Adding a dedicated booster pump and a properly pressurized delivery tank (7–10 PSI empty) guarantees instant, full-pressure flow at the faucet.
FAQ
Can reverse osmosis work on private well water in Indiana?
Yes, but it performs best paired with a water softener or iron filter to prevent premature membrane scaling, along with a booster pump to maintain consistent production pressure above 50 PSI.
Why does my reverse osmosis faucet only produce a weak stream?
Low flow is typically caused by depleted air pressure in the bladder tank (target 7–10 PSI empty), clogged pre-filters, fouled RO membranes from hard water, or well pump cut-in pressure below 40 PSI.
How often should filters be changed on a residential RO system?
Sediment and carbon pre-filters should be replaced every 6 to 12 months, while the semipermeable RO membrane lasts 2 to 3 years under proper upstream water conditioning.